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  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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Topic review (newest first)

shivusuja
2013-09-10 00:27:26

thank you . may be the text book print is wrong.

bob bundy
2013-09-09 17:05:36

hi shivusuja



where





Do a similar thing with the second expression leading to cos(x + alpha)

Now you can use sin^2 + cos^2 = 1 to finish the proof.

Note: But I ended up with minus c^2 not plus.

Bob

shivusuja
2013-09-09 14:37:40

please help me out

IF  a sin x +b cos x = c . Prove that     a cos b sinx=sq root(a sqared+b squared+c squared)

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